Line end doesnt change to squared in vewport

[Goattail]

Hi, I have a problem that seems really easy (need to make line ends square) to solve but i tried multiple solutions and it doesn't work. I dont have a box called "display plot styles" that every solution recommends to check and I have "plot paperspace last" greyed out. I saw some solutions connected to it and i cant change it. Do you have any suggestions on how to work around it? Down below is a screenshot of my settings. I'm working in AutoCAD 2019. Also if i plot it, the final result has the edges squared just like i want to see  in viewport. The paper space have them round like in the viewport.

[tombu]

You have the box called "Plot with plot styles" checked which is unrelated.

Edit your "my style.ctb" click the [Form View] tab up top and modify the settings for "Line end style:" and "Line join style:"

 

Edit: You have to select the plot styles you want to modify first.

Edited August 11, 2021 by tombu
You have to select the plot styles you want to modify first.